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Difficulty: MediumPreoperative and Postoperative Care

A 68-year-old woman is evaluated in the surgical ward due to the sudden onset of shortness of breath and right-sided chest pain that exacerbates with deep inspiration. She is currently on postoperative day 6 following an open radical cystectomy and ileal conduit formation for bladder cancer. The patient has been mostly bedbound since the surgery due to inadequate pain control. Her temperature is 38.1°C (100.6°F), blood pressure is 108/68 mm Hg, pulse is 118/min, and respirations are 26/min. Pulse oximetry shows an oxygen saturation of 88% on room air. Physical examination reveals clear lungs bilaterally. The right calf appears mildly swollen and is tender to palpation. The surgical incision is clean, intact, and shows no erythema or drainage.

Which of the following are the most appropriate initial steps in the management of this patient? (Select 3)

  1. Administer supplemental oxygenAnswer
  2. Perform computed tomography pulmonary angiographyAnswer
  3. Initiate intravenous unfractionated heparinAnswer
  4. D
    Initiate broad-spectrum intravenous antibiotics
  5. E
    Open the surgical dressing and probe the incision site

Answer

The most appropriate initial steps are to administer supplemental oxygen, perform computed tomography pulmonary angiography, and initiate empiric therapeutic anticoagulation with intravenous unfractionated heparin.
This patient presents with a classic clinical picture for a pulmonary embolism (PE): sudden-onset dyspnea, pleuritic chest pain, and hypoxia, accompanied by physical signs of deep vein thrombosis (calf swelling and tenderness). She is at high risk due to her recent major pelvic surgery, active malignancy, and prolonged immobilization. For patients with a high clinical pretest probability of PE (e.g., modified Wells score > 4), the standard of care includes immediate respiratory support with supplemental oxygen, definitive imaging with computed tomography pulmonary angiography (CTPA), and empiric therapeutic anticoagulation prior to diagnostic confirmation, provided there are no absolute contraindications. Intravenous unfractionated heparin is often preferred in the postoperative period due to its short half-life and rapid reversibility in case bleeding occurs.

Step-by-Step Solution

1
Analyze the patient's clinical presentation.
The patient has sudden-onset dyspnea, pleuritic pain, hypoxia, low-grade fever, and calf swelling on postoperative day 6.
Identifying the classic triad of pulmonary embolism (PE) and physical signs of deep vein thrombosis (DVT) establishes a high pretest probability for venous thromboembolism.
2
Determine the immediate supportive care requirement.
Supplemental oxygen is indicated due to an oxygen saturation of 88%.
Hypoxemia must be corrected immediately to prevent tissue ischemia, reduce pulmonary vasoconstriction, and prevent cardiovascular collapse.
3
Determine the definitive diagnostic modality.
Computed tomography pulmonary angiography (CTPA) should be ordered.
CTPA is the gold standard imaging test for confirming a pulmonary embolism in hemodynamically stable patients.
4
Decide on the appropriate pharmacologic intervention.
Empiric intravenous unfractionated heparin must be initiated immediately.
Because the patient has a high clinical probability of PE, therapeutic anticoagulation should not be delayed while waiting for imaging results, as the risk of a fatal recurrent embolus outweighs the postoperative bleeding risk.

Key Concept

Diagnosis and acute management of postoperative pulmonary embolism
Estimated Time:1m 30s
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Topics

Preoperative and Postoperative Care

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